Flex & Rigid Membrane Switches

Details of Flex & Rigid Membrane Switches

The circuit of membrane switches can be flex and rigid. It depends on the customer end application and also related to the cost budget and other considerations. For example, life, resistance, connection type on main board etc.

For the flex circuit membrane switches, there are two types. They are silver printed PET circuit and copper etched FPC circuit. Their difference and advantages&disadvantages listed bellow:

Items

Silver Printed Circuit

Copper Etched FPC Circuit

Material

PET (Polyester)

Copper

Conductor

Printed silver

Copper

Contact Fingers

Silver and Carbon

Gold plated

Contact Buttons Pads

Silver

Gold plated

Life & Reliability

normal

good

Stability

normal

good

Resistance

low

Very low

Cost

low

high

Lead Time

2-3 days

7-10 days

Pitch

0.5mm (not suggested), 1.0mm,1.27mm,2.54mm

0.5mm, 1.0mm,1.27mm,2.54mm

Usually if the membrane switches need assembled many LEDs, then we suggest to use FPC circuit, it can get more stable LED soldering quality. For the normal application the PET circuit is enough, which is more economical. In addition if the conductor pitch is 0.5mm, although we also can print it, but we still suggest to use FPC circuit. Because of that 0.5mm pitch is too small and it is easy to occur the short circuit problem.

LUPHITOUCH Copper Flex FPC membrane switches.jpg 808949-8.jpg FPC membrane switch 4.jpg FPC membrane switch 6.jpg FPC membrane switch 1.jpg LUPHITOUCH PET Flex Membrane Keypad.jpg


For the Rigid circuit membrane switches, the circuit is rigid printed circuit board. The material of rigid PCB is usually FR4 and Copper. By this type of membrane switch, the connector usually is the SMD connector(sometimes also can be straight through connector). For some application which need very stiff capability, then use PCB circuit membrane switch.

LUPHITOUCH membrane switch.jpg PCB membrane switch 3.jpg PCB membrane switch 2.jpg PCB membrane switch 1.jpg Treadmill Keypad.jpg


Hotbar Lamination(Or Heatseal Lamination or Pluse Hot Pression) of FFC and FPC Tail to PET/ITO/PCB/FPC Circuit Layer: sometimes the customer need use the separate FPC or FFC tail connected to the membrane switch PET or PCB or FPC circuit layer, and for the capacitive membrane switches also have such kind of application, then the hotbar lamination(or called pluse hot press lamination, or heatseal lamination) becomes necessary in these application fields. LUPHITOUCH is a professional manufacturer with such kind of lamination capability. We have such kind of assembly machine. We can hotseal the FFC/FPC tail to PET or FPC or PCB circuit of our manufactured membrane switches. Here are some examples of our assembly and our hotseal assembly machine:

HL001.jpg HL002.jpg HL003.jpg HL005.jpg HL006.jpg ACF Pulse Hot Press Machine.jpg

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